asp.net 超鏈接 下載TEXT文件，而不是直接在IE中打開

問題描述：后臺生成了文本文件，用超鏈接提供給用戶下載。點擊超鏈接，下載Excel文件沒問題，但文本文件會直接被打開，而不是彈出下載窗口。

解決方法：把HyperLink改為LinkButton，在Click事件中，用文件流寫文本文件。

關鍵代碼：

 1 PRotected void Button1_Click(object sender, EventArgs e) 2 { 3     string sFileName = System.IO.Path.GetRandomFileName(); 4     string sGenName = "Friendly.txt"; 5  6     //YOu could omit these lines here as you may 7     //not want to save the textfile to the server 8     //I have just left them here to demonstrate that you could create the text file  9     using (System.IO.StreamWriter SW = new System.IO.StreamWriter(10            Server.MapPath("TextFiles/" + sFileName + ".txt")))11     {12         SW.WriteLine(txtText.Text);13         SW.Close();14     }15 16     System.IO.FileStream fs = null;17     fs = System.IO.File.Open(Server.MapPath("TextFiles/" + 18              sFileName + ".txt"), System.IO.FileMode.Open);19     byte[] btFile = new byte[fs.Length];20     fs.Read(btFile, 0, Convert.ToInt32(fs.Length));21     fs.Close();22     Response.AddHeader("Content-disposition", "attachment; filename=" + 23                        sGenName);24     Response.ContentType = "application/octet-stream";25     Response.BinaryWrite(btFile);26     Response.End();27 }

參考文檔：http://www.codeproject.com/useritems/textfile.asp